from tkinter import *

X = int(input('Введите начальную координату X:'))

Y = int(input('Введите начальную координату Y:'))

N = int(input('Введите начальную координату N:'))

coords = [10,0,10,0,10,10,20,10,20,20,0,201]

if N == 0 and X>=0 and X<=500 and Y>=0 and Y<=500:
     pass
else:
     if N > 0 and 0*N+X>=0 and 0*N+X>=0  and 20*N+X<=500 and 20*N+X<=500:
         pass
     else:
         if N < 0 and 20*N+X>=0 and 20*N+Y>=0 and 0*N+X<=500 and 0*N+Y<=500:
             pass
         else:
             print("Размер фигуры превышает максимальный размер поля")
             exit()

root = Tk()
root.title("Ит марафон")
root.geometry("500x500")
canvas = Canvas(bg="white", width=500, height=500)
canvas.pack(anchor=CENTER, expand=1)

canvas.create_polygon(coords[0] *N+X, coords[1] *N+Y,
                       coords[2] *N+X, coords[3] *N+Y,
                       coords[4] *N+X, coords[5] *N+Y,
                       coords[6] *N+X, coords[7] *N+Y,
                       coords[8] *N+X, coords[11] *N+Y,)
root.mainloop()

